Which of the following statements is true?

A. The rational number system is not closed under multiplication, because the product of two rational numbers is not always an irrational number.

B. The rational number system is not closed under multiplication, because the product of two rational numbers is not always a rational number.

C. The rational number system is closed under multiplication, because the product of two rational numbers is always a rational number.

D. The rational number system is closed under multiplication, because the product of two rational numbers is always an irrational number.

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb

answer 1 : option "c"

answer 2 : option "d"

answer 3 : option "b"

answer 4 : option "d"

answer 5 : option "b"

answer 6 : option "a"

answer 7 : option "c"

answer 8 : option "d"

answer 9 : option "c"

answer 10 : option "d"

answer 11 : option "c"

answer 12 option "b"

answer 13 option "c"

answer 14 option "c"

answer 15 option "d"

answer 16 option "a"

answer 17 option "b"

answer 18 option "c"

answer 19 option "a"

answer 20 option "a"

answer 21 option "c"

d

explanation:

remove parenthesis:

=

apply rule

=

multiply fractions:

=

=

divide:

=

mordancy.

i think this is a open ended question but i agree with other guy who said you should ask it at english section